Drive mechanism for crushing-rolls.



Patented Apr. 8, I902.

JUIJEIEIU D IJCIIDUEIEIUUJUI EUUJIIEIEIDEID :JJUUEF'EIDUIDU] mm El U I: DUE

IJUD'CICIUUEUW :IUUUDEIIDUJUI WEIIEIIUDEIDD IJEIUUEIEIDUJU] UJIIEIUDDDE EDUJIJDDDEIIJ HJUJEIEIUUD A. M. ACKLIN.

DRIVE MECHANISM FOR CRUSHING ROLLS.

(Application filed May 1, 1901.;

(No Model.)

Inventor.

Wqgnesses.

BQV. J"\. UVQRLLW Rl o y win/m his Attorney.

Unrrnn ATENT Fries.

ALFRED M. AOKLIN, OF PI TTSBURG, PENNSYLVANIA.

DRIVE MECHANISM FOR CR USHING-ROLLS SPECIFICATION forming part of Letters Patent N 0. 697,31 1, dated April 8, 1902.

Application filed May 1, 1901. Serial No. 58,360. (No model.)

To all whom, it may concern:

Be it known that I, ALFRED M. ACKLIN, a

citizen of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain newand useful Improvements in Drive Mechanism for Cru shin g-Rolls; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to new and useful improvements in a drive mechanism for crushing-rolls.

The usual means of transmitting a reverse rotary motion from one crushing-roll to the other is to employ gear-wheels upon the axis of the rolls to mesh with one another, and as one or both of such rolls are adjustable from or toward one another the teeth of such wheels are necessarily of great depth to permit of such adjustment. VVheel-teeth of this structure are not capable of withstanding severe strains, as the unusual large amount of clearance between the teeth permits considerable backlash, which is detrimental to the operation and life of the machine. Besides, the adjustment of the rolls is limited to the workable depth of the wheel-teeth. stances it is required to crush the material into a variety of sizes, in which case two or three pairs of wheels of various pitch diametors are used to drive the rolls.

My object is to dispense with gears as a means of transmitting a reverse motion from one roll to the other and substitute a mechanism which will fully overcome the abovementioned difficulties.

I accomplish my objects as illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of a crushing apparatus having my improvements connected thereto. Fig. 2 is a plan view of the same. Fig. 3 is a side view of a portion of a pair of wheels of the form heretofore mentioned as employed for transmitting rotary motion from one roll to the other. Fig. 4 is a reduced side View of a three-roll form of crusher, showing the manner in which myimproved drive mechanism is attached thereto.

Referring to the drawings for a detailed description of the apparatus, the numeral 1 in- In some indicates the bed-plate, which may be of any suitable form and upon which are formed or secured the pillow-blocks 2 and uprights 3 and 3, said uprights having secured thereto the caps 4. Between said caps4 and the bedplate are arranged the longitudinally adjustable bearings 5 and 6, within which are mounted the shafts 7 and 8 of the crushingrolls 9 and 10. From the rear of said bed plate uprights S extend the rods 11, which have secured to their outer ends the adj ustable cross-bars 12. Each bearing of the roll 10 has extending therefrom a shouldered rod 13, which projects through openings formed in the bed-plate uprights and cross-bars. The shoulders of these bars are threaded for a suitable distance and have fitted thereto the nuts 13. Spiral springs 14 are arranged upon the rods to engage the inner surfaces of the cross-bars and the Washers 15, which are fitted upon the rod-shoulders. Mounted within the said bed-plate pillow-blocks is the shaft 16, which has rigidly secured thereto the fly-wheel 17, gear-pinion 18, and band wheels 19 and 20. Upon each of the said band-wheels 20 is mounted an endless belt 21, which passes over the large band-wheels 22, which are secured upon the shaft of the said crushing-roll 10. Loosely mounted upon the aforesaid shaft 16, astride of the bandwheels 20, are the forked bars 23. Each of these bars is provided at its lower or forked end with an idler-pulley 2a to engage the belt 21 and at their upper ends with an adjustable weight 25 to cause engagement of said pulleys with and maintain a properv tension on the belts.

'Rigidly secured to one end of the crushingroll shaft 7 is the large gear-wheel 26, which meshes with the said gear-pinion 18 for the purpose of transmitting motion to the roll.

In practice power is transmitted by a belt 27 from a suitable source to the band-wheel 9 or by other suitable means.

In the drawings the crushing-rolls are shown in close contact with one another, as would be the case in crushing fine grades of material; but if it is desired to crush material of coarser grades the nuts 13 upon the bearing-bars 13 are turned so as to adjust the roll 10 from the roll 9 the required distance.

Power being applied to the band-wheel 19,

/ and 35.

as previously stated, reversemotion is given to the crushing-rolls through the medium of gear and band wheels, and should itoccur that any unusual hard or foreign material passes between the rolls or should the material introd uced between the rolls be fed beyond the crushing capacity the spiral springs 14 permit the roll 10 to adjust itself," thereby acting as cushions to take up the shock.

. It will be observed that the gear-wheel 1S and pulleys 20 are shown of relatively small diameters, which is desirable in order that the fly-wheel may travel at a high rate of speed, and thereby through the medium of the gears transmit a positive and regular motion to the roll 9, which will effectually prevent possible stoppage of the machine when large lumps are introduced.

It is well known by those familiar with this class of machinerythat if one of a pair of rolls be driven at a practically uniform speed that very little power other than the passage of the material being crushed is required to keep the opposing roll in motion. Therefore one belt will be sufficient in most cases. However, the use of two belts as a drive is preferable in some cases.

It will be noted that by the employment of a belt-drive should very hard pieces of material, such as metal, he accidentally fed into the machine that the elasticity or slip of the belts will allow the rolls to change their relative positions and permit the roll-teeth to adjust themselves about the said hard material, thereby reducing or preventing any possibility of injury to the machine.

In some cases the three-roll form of crusher, as shown at Fig. 4, is prefered, in which case the shaft of the roll 28 is provided with a gearwheel 29, which meshes with a pinion 30 on the drive-shaft 31. The shafts of the rolls 32 and 33 are provided with band-wheels 34= Small band-wheels 36 are fixed to the drive-shaft and are connected by belts 37 to the roll band-wheels. Weighted bars 38 are pivotally arranged upon the drive-shaft and are provided at their lower ends with pulleys 39, whereby tension is'placed upon the belts. It will be readily seen that the same means for rotating the rolls may be employed in the three-roll form of crusher-s as those using but two rolls.

Variations as to details of construction may be made in this apparatus without departing from the principles involved.

Having thus fully shown and describedlmy invention, what I claim as new, and desire to secure by Letters'Patent, is-

1. The combination with a driving-shaft,

and a crusher-roller geared directly therewith, of a second roller, yielding means for pressing said second roller toward the other roller and permitting it automatically to recede therefrom, as described, and gearing connecting said second roller directly with said driving-shaft and comprehending an endless belt and a tension-regulator for said belt, said tension-regulator serving automatically to take up slack in said belt when the second roller approaches the other and yielding antomaticallyto the pull on said belt when said second roller recedes from said other roller.

2. The combination with a driving-shaft having a toothed wheel, and a crushing-roller having a fixed relation to said driving-shaft and provided with a toothed wheel intermeshed with said toothed wheel on the driving-shaft, of a second crushing-roller having means by which its relation to the first-mentioned roller and driving-shaft is automatically adjusted to inequalities in the material being crushed, and'a gearing connecting said second roller directly with said driving-shaft, said gearing comprehending an endless belt and a tension-regulator for said belt, said parts being so related to each other that the slack in the belt, when the second roller approaches the other, will be taken up automatically by the tension-regulator and the latter will automatically yieldto the pull on said belt when said second roller recedes from said first roller and will hold said belt under tension at all times, substantially as described.

3. The combination of a driving-shaft having a fly-wheel thereon, a second shaft journaled in bearings, gearing connecting said second shaft directly with said driving-shaft, an arm pivotally mounted on said drivingshaft and provided with counterbalancing means at one side of its pivotal point and with a belt-engager at the other side thereof, a band-wheel fixed on said driving-shaft adjacent to said arm, a crushing-roller fixed on said second shaft, 2. third shaft provided with a crushing-roller and mounted in bearings having adjustable relation to said drivingshaft and first shaft, and provided with yielding means for pressing it toward the same and causing its crushing-roller automatically to accommodate itself to inequalities in the material being crushed, said third shaft having a band-wheel, and an endless driving-belt engaging the band-wheels of said drivingshaft and third shaft and engaged between the same by said belt-engager, substantially as described and for the purpose set forth.

4. The combination with a bed-plate, a driving-shaft journaled in bearings supported thereby, and a crushing-roller having its shaft journaled in bearings supported'by said bed-plate and geared directly with said driving-shaft, of fixed uprights 3 projecting from opposite sides of said bed-plate, rods projecting from said uprights and having adjustable cross -.bars at their outer ends, adjustable bearings mounted on said bed-plate and provided with shouldered rods which extend rearward therefrom through openings in said uprights and cross-bars, adjustable nuts threaded upon the shoulders of said rods, washers also mounted on said shoulders, springs encircling said shouldered rods and interposed In testimony whereof I have hereunto af between said washers and cross-bars, a shaft fixed mysignature in the presence of two submounted in said adjustable bearing, a beltscribing Witnesses gearing connecting said latter shaft directly 5 with said driving-shaft, and an automatic Witnesses:

tension-regulator for the belt of the latter RICHARD S. HARRISON, gearing. E. D. HICKMAN.

ALFRED M. AOKLIN. 

